What is a hopper grid used for?

A hopper grid prevents debris and small objects from entering the drainage inlet while allowing water to flow freely into the gully below.

Is the 150 mm square grid compatible with FloPlast hoppers?

Yes — it fits FloPlast 110 mm rectangular and square hoppers, clipping securely into the inlet.

Will this grid fit hoppers from other manufacturers besides FloPlast?

Yes, the UGSG is designed to fit any 150mm square hopper, not just FloPlast units. It's a universal size that works with most standard square hoppers on the market.

How does the grid attach to the hopper - does it need screws or clips?

The grid simply clips into position without requiring any screws or additional fixings. This makes installation and removal straightforward for cleaning or maintenance.

What size debris will this grid actually stop from entering the system?

The grid openings are sized to prevent leaves, twigs, and similar debris from entering whilst maintaining good water flow. It won't stop very fine particles but will catch anything that could cause blockages in 110mm drainage pipes.

Can I walk on this grid or put weight on it during installation work?

Whilst the PVC-U construction is robust, it's designed as a debris filter rather than a load-bearing cover. Avoid standing directly on it or placing heavy tools on the grid.

How do I clean this grid when it gets clogged with leaves and debris?

Simply lift the grid out by hand - no tools needed due to the clip-in design. Clear debris by hand or rinse with water, then clip back into position.

Will this grid become brittle in cold weather or fade in strong sunlight?

The weather-resistant PVC-U material is formulated to withstand UK weather conditions including frost and UV exposure. It maintains its strength and colour over many years of outdoor use.

What's the actual opening size between the grid bars?

The grid features appropriately sized openings that balance debris prevention with water flow - typically around 10-15mm gaps. This prevents most problematic debris whilst ensuring rainwater flows freely through the system.

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The FloPlast 150mm Square Hopper Grid (UGSG) provides a robust top cover for 110mm hoppers, designed to prevent debris entering the drainage system while allowing unrestricted water flow.

Manufactured from strong, weather-resistant PVC-U, it’s suitable for all FloPlast hoppers and other 150mm square units.
Easy to install or replace, the grid simply clips into position and offers long-lasting protection for underground drainage systems.